552D - Vanya and Triangles 11736806 I used Heron's formula to solve the problem but am getting wrong answer.. Is something wrong??

Here is my code for the problem problem 525B- mysolution . I think I have understood the problem perfectly and coded it but aint able to find what mistake I am making and why i aint getting AC.. Can anyone help?? If you have any other way of solving this you can share that too and if you find a thing or two wrong in my code or concept, please feel free to explain me those!! Thank You guys!! :)